Exponential Functions Bellringer

Suppose the population of a species of insects doubles every year. The function gives the number of insects after x years. How many insects will there be after 3 years?

• 9600

• 12,800

• 200

• 8000

• $ 819.20

• $ 1.4

• $ 140

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth

• Linear

• Exponential Decay

• None of the Abovee

What type of function is
y = 7(5/4)^x?

• Exponential Growth

• Exponential Decay

• Linear

• None of the above

Determine the asymptote for the function
f(x)=3(2)^x-4+5

• x=4

• y=4

• x=5

• y=5

Determine the range for the function
f(x)=3(2)^x-4+5

• [5,∞)

• (5,∞)

• [4,∞)

• (4,∞)

Determine the domain for the function
f(x)=3(2)^x-4+5

• [5,∞)

• (5,∞)

• (-∞,∞)

• (∞,-∞)

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• f(x)=400(.97)^x

• f(x)=400(1-0.03)^x

• f(x)=400(1.03)^x

• f(x)=400(0.03)^x

A new savings account is opened with $1500 and gains 1.5% annual interest. What is the exponential function?

• f(x)=1500(1+1.5)^x

• f(x)=1500(1+0.015)^x

• f(x)=1500(1.00375)^x

• f(x)=1500(1.5)^x

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x

• y=6(1+14)^x

• y=6(1.14)^x

• y=6(0.86)^x